Hisense/ZDNET Follow ZDNET:  Add us as a preferred source  on Google. Whether you're looking to upgrade your main TV to set up the ultimate home theater, or you're just looking for a high-quality second screen for your home, you'd be hard-pressed to find a better option than the Hisense U6 Pro. And just in time for the FIFA World Cup , you can pick up the 75-inch Hisense U6 Pro for just under $850 at Amazon -- a nearly 40% discount. Also: TCL vs. Hisense The Mini LED panel is Pantone Validated for color accuracy, which means you'll get some of the best picture quality outside of ultra-premium OLED and Micro RGB models. It's also backed up by a 144Hz refresh rate, making it perfect for smoother motion while watching live sports, streaming, and console gaming.  Speaking of gaming, the dedicated picture mode supports AMD FreeSync Premium Pro VRR to help prevent screen tearing.…